Which of these advances did Han scientists make? Select all that apply. devised the base-20 number system
developed the concept of zero
created more accurate calendars
invented the compass

d. she conquered the black sea coast and parts of poland.

ernest bai koroma (president) loko christianity

ahmad tejan kabbah (president) mandingo islam

johnny paul koroma (military junta limba christianity

julius maada bio (military junta mende christianity

the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.

the first two years of american revolution was not very encouraging for the patriots since the british were far superior in sea power, arms and troops.